Belt-stretcher



(No Model.)

J. FERN & 0. LYNCH.

BELT STRETGHER.

' No. 591,214. Patented Oct. 5,1897.

NITED STATES I PATENT Enron.

JOHN FERN AND CALVIN LYNCH, OF SCRANTON, PENNSYLVANIA.

BELT-STRETCHER.

SPECIFICATION forming part of Letters Patent No. 591 ,214, dated October 5, 1897.

Application filed September 3, 1896. Serial No. 604,710. (No model.)

To all whom it may concern:

Be it known that we, JOHN FERN and CAL- VIN LYNCH, citizens of the United States of America, residing at Scranton, in the county of Lackawanna' and State of Pennsylvania, have invented certain new and useful Improvements in Belt-Stretchers, of which the following is a specification, reference being had therein to the accompanying drawing.

The object of this invention is the provision of a belt and cable stretcher that will clamp the belt and will exert thereon a pull in a direct line; furthermore, in providing means whereby the lever is held in position by the use of dogs of peculiar shape which will effect a positive engagement with the teeth of the wheels.

A further object of the invention is to produce a belt clamp-stretcher which will possess advantages in points of simplicity, efficiency, and durability, making it at the-same time comparatively inexpensive to produce and sustain, since theseveral parts are made in dependent and are removable, that worn or broken parts may be readily replaced at small cost.

\Vith the above and other objects in view the invention consists in the novel details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and specifically claimed.

In describing the invention in detail reference is had to the accompanying drawing, forming part of this specification, wherein by a plan View the invention is illustrated, a part of the casing being broken away to disclose certain elements forming the device.

In the drawing, 1 is the base of the clamp proper.

2 is a block sliding in the housing 3, and 4: 4

are cam-levers pivoted to the housing at 5 and provided with cam-surfaces 6, which engage the block 2, as shown by the dotted lines. This clamp is connected with the stretching mechanism by thechain or other flexible connection 7 The stretcher proper consists of a housing 8, in the corner of which is pivoted a toothed wheel 9, the wheel and lever being pivoted on a common shaft 10. Pivoted in thebifurcated end of the lever is a dog 1.1, having an arm 12, and a spring 13 engaging the arm. The

described and is pivoted to the housing to engage the teeth, as shown, this latter dog serving as a retainer and the former, moving with the lever, actuates the wheel. The dog on the wheel is so arranged that it can be thrown into engagement with the tooth next to the one held by thedog 16 to insure a long stroke.

An arm 17 is secured to the housing and is provided with a pivoted hook 18, to which the flexible connection of the clamp is attached.

Arranged in the housing and sliding on the bottom thereof is a rack-bar 19, which is engaged by the wheel to actuate or hold the same, and this rack-bar has a pivoted hook 20.

It will be seen that this device can be readily employed as a hoist for elevating small objects of a hundred or two thousand pounds by suspending it by one hook and attaching the object to be raised to the opposite hook.

The operation and advantages will be apparent from the foregoing description, and it will be noted that various changes may be made in the proportions and other details of construction without departing from the spirit of the invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In a belt and cable stretcher, a housing, an arm secured thereto, a rack-bar adapted to slide in said housing, a toothed wheel pivoted in said housing and adapted to engage said rack-bar, a lever pivoted to said Wheel, a dog pivoted to the housing, said dog having a concaved'edge and a projecting nose engaging the wheel, a lever secured to the axis of the wheel, and a spring-pressed dog pivoted to the lever with its pivoted portion adapted to lie in the concaved portion of the other dog when they approach, said second dog having a nose to engage the teeth of the wheel, substantially as described.

' 2. In combination, ahousing, a toothed Wheel pivoted thereon, a dog having a nose In testimony whereof We affix our signaengaging the toothed Wheel, the edge of the tures in presence of two Witnesses. dog being eoneaved, a second dog operated by JOHN FERN. a lever and having a nose operating over the CALVIN LYNCH. 5 ooneaved portion of the first-named dog and Witnesses:

engaging the toothed Wheel, substantially as WM. M. FOWLER, described. GEO. W. SKILLHORN. 

